Final answer:
The claim that Charles Dickens sabotaged his marriage by idealizing his sister-in-law is speculative and reflects the complex interplay between an author's imagination and personal life.
Step-by-step explanation:
The claim that Charles Dickens sabotaged his own marriage by idealizing his late sister-in-law and comparing her against his wife is a theoretical interpretation rather than a factually established truth. The notion alludes to Dickens' complex personal relationships and his potential inability to separate his imaginative ideals from reality, leaving his wife at an impossible disadvantage.
This interpretation is a reflection of the broader scope of how literature can sometimes mirror an author's personal life. It is important to consider such claims within the context of historical and biographical evidence which may provide a deeper understanding of Dickens' personal life and the societal expectations of women during his time.